package com.zsl.idating.security;
import java.util.Collection;
import java.util.Iterator;

import org.springframework.security.access.AccessDecisionManager;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.access.ConfigAttribute;
import org.springframework.security.access.SecurityConfig;
import org.springframework.security.authentication.InsufficientAuthenticationException;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;


public class IDAccessDecisionManager implements AccessDecisionManager {

	//In this method, need to compare authentication with configAttributes.
	// 1, A object is a URL, a filter was find permission configuration by this URL, and pass to here.
	// 2, Check authentication has attribute in permission configuration (configAttributes)
	// 3, If not match corresponding authentication, throw a AccessDeniedException.
	public void decide(Authentication authentication, Object object,
			Collection<ConfigAttribute> configAttributes)
			throws AccessDeniedException, InsufficientAuthenticationException {
		if(configAttributes == null){
			return ;
		}
		System.out.println(object.toString());  //object is a URL.
		Iterator<ConfigAttribute> ite=configAttributes.iterator();
		while(ite.hasNext()){
			ConfigAttribute ca=ite.next();
			String needRole=((SecurityConfig)ca).getAttribute();
			for(GrantedAuthority ga:authentication.getAuthorities()){
				if(needRole.equals(ga.getAuthority())){  //ga is user's role.
					return;
				}
			}
		}
		throw new AccessDeniedException("no right");
	}

	@Override
	public boolean supports(ConfigAttribute attribute) {
		// TODO Auto-generated method stub
		return true;
	}

	@Override
	public boolean supports(Class<?> clazz) {
		return true;
	}


}
